HaXessibility & Flexibility !
We can work with Flex components in HaXe using an external loading as we can see in HaXe website tutorial:http://haxe.org/tutos/flex_and_haxe_intro
The post following is a first attempt to use Flex components in HaXe without external loading. (Merging SWF at compilation).

HaXe standard library, contains remoting package (haxe.remoting) to communicate between different plateforms (Server/JS/Flash).LocalConnection is a way to communicate from SWF to another SWF.
HaXe includes a powerful remoting layer for the native Flash LocalConnection that is really easy to use !